Method of preparing gelatin tubes for medicinal purposes



UNITED STATES PATENT OFFICE.

SUMIYUKI IKEDA, OF TOKYO, JAPAN, ASSIGN'OR T0 TOMODA GOSHI KAISI-IA, 01!TOKYO, JAPAN, A CORPORATION OF JAPAN.

METHOD 0]! PREPARING GELATIN TUBES FOR MEDICINAL PURPOSES.

110 Drawing.

To all whom it may concern:

Be it known that I, SUMIYUKI IKEDA, a subject of the Emperor of Japan,residing at No. 1 Yayesu-cho Itchome, Kojimachi-ku, city of Tokyo,Japan, have invented Methods of Preparing Gelatin Tubes for MedicinalPurposes, of which the following is a specification.

The present invention relates to the art of preparing gelatin tubes forhollow rods containin medicinal substances and its object is to 0 taingelatin tubes for medicinal purpose by oiling the original rod withcastor oil, then dipped in a gelatin solution for a short time and afterdr ing the gelatin tube thus formed is drawn 0 from the rod.

It is well known that the hollow rod containing a medicinal substance ismost effective for curing the inflammation of the urethra because of thefact that the outer tube of the hollow rod, after insertion in theurethra, is dissolved by the secrete of the same and the inner contentof the tube contacts with the part fi'ected gradually and for acomparatively long time. The char acteristic point of the hollow rodlies in the fact that its outer tube is made of gelatin.

According to the present invention, a metallic original tube having asmooth surface and a diameter equal to that ofthe gelatin tube required,is oiled with castor Specification of Letters Patent.

Patented Sept. 13, 1921.

Application filed February a, 1919. Serial No. 274,702.

oil and dipped into a warm gelatin solution conslsting of 100 parts ofgelatin and 300 parts of water. The rod is then drawn up from thesolution, air dried and after the A method of preparing a hollow gelatinrod for introducing a medicinal substance into the urethra, in which arod is oiled with castor oil and dipped into a warm gelatin solutionwhich is then dried and the hollow gelatin body is subsequently drawnoff the original rod.

In testimony whereof I aflix my signature in presence of two Witnesses.

SUMIYUKI IKEDA. Witnesses K. KURoKAwA, K. MATSUNO.

